CN115092090A - Self-adaptive safety airbag control method and control system based on safety belt - Google Patents
Self-adaptive safety airbag control method and control system based on safety belt Download PDFInfo
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- CN115092090A CN115092090A CN202210669932.XA CN202210669932A CN115092090A CN 115092090 A CN115092090 A CN 115092090A CN 202210669932 A CN202210669932 A CN 202210669932A CN 115092090 A CN115092090 A CN 115092090A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000005474 detonation Methods 0.000 claims abstract description 26
- 238000004880 explosion Methods 0.000 claims abstract description 24
- 238000003780 insertion Methods 0.000 claims abstract description 19
- 230000037431 insertion Effects 0.000 claims abstract description 19
- 230000003044 adaptive effect Effects 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 abstract 1
- 206010019196 Head injury Diseases 0.000 description 1
- 208000029224 Thoracic injury Diseases 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
- B60R2021/006—Type of passenger
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01204—Actuation parameters of safety arrangents
- B60R2021/01211—Expansion of air bags
Abstract
The invention relates to a self-adaptive safety airbag control method and a self-adaptive safety airbag control system based on a safety belt. The method comprises the following steps: collecting a passenger weight signal, a seat heating state signal, an outside temperature signal, a vehicle deceleration signal and a safety belt effective insertion signal, and sending the collected signals to an air bag controller; the passenger classification module calculates the effective length Lr of the safety belt, performs passenger classification and identification, and transmits the information of the passenger classification to the safety air bag controller; the safety airbag controller carries out calculation of an explosion algorithm of the safety airbag, generates an explosion instruction and sends the explosion instruction to the gas generator controller; the gas generator controller is used for responding to the grade detonation of the detonation signal; the gas generator is used for carrying out detonation control, releasing gas and inflating the safety airbag assembly. The invention can identify the physical signs and positions of passengers according to the effective length of the safety belt, can identify passengers of different statures, has high identification progress and provides optimal protection for the passengers.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a self-adaptive safety airbag control method and a self-adaptive safety airbag control system based on a safety belt.
Background
At present, self-adaptive adjustment of the front airbag is divided into two categories, namely, a deceleration sensor is arranged at the front end of a vehicle and is matched with the deceleration sensor inside an airbag controller to judge the collision strength of the vehicle, so that the airbag is controlled to be detonated in two stages, self-adaptive adjustment of the airbag is achieved, however, precise control cannot be carried out according to the type and the position of a passenger, and the protection effect is general. Secondly, the scheme of adding a seat position sensor to a camera is adopted in the vehicle, so that accurate judgment can be carried out according to the position and physical signs of a passenger, the self-adaptive control of the safety airbag is realized, and the cost is higher.
Disclosure of Invention
The invention provides a self-adaptive safety airbag control method and a self-adaptive safety airbag control system based on a safety belt, which can identify the physical signs and positions of passengers according to the effective length of the safety belt, can identify passengers of different sizes, have high identification progress, provide optimal protection for the passengers, and solve the problems that the front safety airbag automatically adjusts the size, the pressure and the like according to the types of the passengers in collision and simply and conveniently identifies the characteristics and the positions of the passengers in the front row.
The technical scheme of the invention is described as follows by combining the attached drawings:
according to a first aspect of an embodiment of the present invention, there is provided a belt-based adaptive airbag control method including:
collecting a weight signal of the passenger, and sending the weight signal to a passenger classification module 6;
acquiring a seat heating state signal, and sending the seat heating state signal to the passenger classification module 6;
acquiring an outside temperature signal, and sending the outside temperature signal to a passenger classification module 6;
collects the vehicle deceleration signal and sends the deceleration signal to the first airbag controller 7;
acquiring whether the safety belt is effectively inserted or not, and sending the acquired safety belt effective insertion signal to the safety airbag controller 7;
the passenger classification module 6 receives the passenger weight signal, the seat heating state signal and the vehicle outside temperature signal, calculates the effective length Lr of the safety belt, performs passenger classification and identification according to the effective length Lr of the safety belt, and transmits the information of passenger classification to the safety air bag controller 7;
the safety airbag controller 7 receives the vehicle deceleration signal, the safety belt effective insertion signal and the occupant classification information to calculate the safety airbag explosion algorithm, generates an explosion instruction and sends the explosion instruction to the gas generator controller 9;
the gas generator controller 9 receives the signal from the safety air bag controller 7, judges the grade of the section detonation signal and detonates the gas generator according to the grade of the detonation signal;
the gas generator performs detonation control to release gas to inflate the airbag assembly 8.
Further, the seat heating state signal is divided into two states, namely, an open state ON and a closed state OFF.
Further, the signal for acquiring whether the safety belt is effectively inserted comprises an inserted signal and an unplugged signal.
Further, the specific method for calculating the effective length Lr of the seat belt by the occupant classification module 6 is as follows:
calculating the effective length Lr of the safety belt as L according to the weight signal, wherein L is the length of the safety belt;
the effective length Lr of the safety belt calculated according to the seat heating state signal is L a, and a is a correction coefficient of the seat heating state signal;
the effective length Lr of the safety belt calculated according to the temperature signal outside the automobile is L b, and b is a correction coefficient of the temperature signal outside the automobile;
when the seat heating state signal and the safety belt effective insertion signal are both invalid signals, the effective length Lr of the safety belt is equal to L;
when only the seat heating state signal is an effective signal, the effective length Lr of the safety belt is L a;
when only the temperature signal outside the automobile is an effective signal, the effective length Lr of the safety belt is L b;
when the seat heating state signal and the vehicle outside temperature signal are both valid, the effective length Lr of the seat belt is L × b.
Further, when the seat heating state signal is ON, indicating that the environment is cold and the thickness of the occupant's clothes is increased, the setting parameter a is a 1; when the seat heating state signal is OFF, it indicates that the environment is comfortable and the thickness of the occupant's clothes is normal, and the setting parameter a is a 2.
Further, when the collected temperature T < -15 outside the vehicle indicates that the environment is cold, the dressing thickness of the passenger is the thickest, and b is set to be b 1; when the acquired temperature outside the vehicle is-15 and T <5, the environment is cold, the dressing thickness of the passenger is thicker, and b is set as b 2; when the acquired temperature outside the automobile is more than or equal to 5 and T is less than 15, the environment is cool, the dressing thickness of the passengers is thin, and b is set as b 3; when the collected temperature outside the vehicle is equal to or less than 15T, the environment is moderate, the dressing thickness of the passenger is the thinnest, and b is set to be b 4.
Further, a specific method of classifying the occupant according to the effective belt length Lr is as follows:
when Lr < L1, the occupant type is a child occupant;
when L1 is less than or equal to Lr < L2, the passenger type is a small-sized passenger;
when L2 is less than or equal to Lr < L3, the passenger type is a middle-size passenger;
when Lr is larger than or equal to L3, the passenger type is a large-size passenger;
wherein the child passenger is a passenger with a sitting height less than 750 mm; the small-size passenger is a passenger with the seat height range of 750-790 mm; the middle-size passenger is a passenger with the seat height range of 791-890 mm; the large-size passenger is a passenger with the sitting height of more than 890 mm.
Further, the specific method for generating the airbag explosion command by the airbag controller 7 receiving the vehicle deceleration signal, the effective safety belt insertion signal and the occupant classification information is as follows:
when the vehicle deceleration signal a > a1, and the seatbelt effective insertion signal S is inserted, and the occupant classification P is a small-sized occupant, the airbag controller 7 issues a first ignition command to the gas generator controller 9;
when the vehicle deceleration signal a > a1, and the seatbelt effective inserted signal S is inserted, and the occupant classification P is a medium size occupant, the airbag controller 7 issues a second ignition command to the gas generator controller 9;
when the vehicle deceleration signal a > a1, and the seatbelt effective insertion signal S is inserted, and the occupant classification P is a large-sized occupant, the airbag controller 7 issues a third ignition command to the gas generator controller 9;
when the vehicle deceleration signal a is equal to or less than a1, or when the seatbelt effective insertion signal S is not inserted, or when the occupant classification P is a child occupant, the airbag controller 7 does not issue an ignition command.
Further, the gas generator controller 9 receives a signal from the airbag controller 7 to perform the explosion control, and the specific method is as follows:
when the detonation signal is level 1, the detonation gas generator is level 1 and 10;
when the detonation signal is level 2, detonating the level 1 10 of the gas generator and the level 2 of the gas generator 11;
when the detonation signal is 3 grades, the detonation gas generator is 1 grade 10, the gas generator is 2 grade 11 and the gas generator is 3 grade 12;
and the 1-stage 10 gas generator, the 2-stage 11 gas generator and the 3-stage 12 gas generator are subjected to detonation control, release gas and inflate the safety airbag assembly 8.
According to a second aspect of embodiments of the present invention, there is provided a seatbelt-based adaptive airbag control system, comprising:
the safety belt length sensor 1 is arranged in a seat cushion and used for acquiring a weight signal of a passenger;
the seat heating sensor 2 is arranged in the seat and used for acquiring a seat heating state signal;
the temperature sensor 3 is arranged outside the vehicle and used for acquiring a temperature signal outside the vehicle;
a collision sensor 4 disposed on the vehicle body for acquiring a vehicle deceleration signal;
the safety belt lock catch sensor 5 is integrated in the safety belt lock catch and is used for acquiring whether the safety belt is effectively inserted;
the passenger classification module 6 is used for receiving signals collected by the safety belt length sensor 1, the seat heating sensor 2 and the temperature sensor 3, calculating the effective length Lr of the safety belt, classifying and identifying passengers according to the effective length Lr of the safety belt, and transmitting the classification information of the passengers to the safety airbag controller 7;
the safety air bag controller 7 is used for receiving the classification information of passengers, and signals collected by the collision sensor 4 and the safety belt lock catch sensor 5 to generate an explosion instruction to the gas generation controller 9;
a gas generator controller 9 for receiving a signal from the airbag controller 7 and controlling the gas generator;
the gas generator is used for receiving signals of the gas generation controller 9, carrying out explosion control, releasing gas and inflating the safety airbag assembly 8; the gas generator includes a gas generator 1 stage 10, a gas generator 2 stage 11, and a gas generator 3 stage 12.
And an airbag assembly 8 for protecting an occupant.
The invention has the beneficial effects that:
1) the invention solves the problem that the front safety air bag automatically adjusts the volume, the pressure and the like according to the types of passengers in collision, and provides the best safety protection for the passengers with different statures;
2) according to the invention, the physical signs and positions of the passengers can be identified according to the effective length of the safety belt, the passengers can be subdivided into children passengers, small-size passengers, middle-size passengers and large-size passengers through threshold value setting, the key performances such as the volume, the pressure and the like of the safety airbag are automatically adjusted according to different passenger types, and the head and chest injuries of the passengers are effectively protected;
3) the invention adopts the effective length characteristic of the safety belt to carry out algorithm judgment, and utilizes the temperature signal and the seat heating state signal to correct the length threshold value of the safety belt, thereby solving the problem that the dressing thickness of the passenger influences the identification accuracy of the passenger, and having more accurate identification, concise logic and low cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and it is obvious for those skilled in the art that other related drawings can be obtained from the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a seat belt-based adaptive airbag control system according to the present invention.
In the figure:
1. a seat belt length sensor;
2. a seat heating sensor;
3. a temperature sensor;
4. a collision sensor;
5. a seat belt buckle sensor;
6. an occupant classification module;
7. an airbag controller;
8. an airbag assembly;
9. a gas generation controller;
10. gas generator stage 1;
11. 2 stages of gas generators;
12. gas generator 3 stages.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.
Example one
The embodiment of the invention provides a self-adaptive safety airbag control method based on a safety belt, which comprises the following steps:
a passenger weight signal is collected through the safety belt length sensor 1, and the weight signal is sent to the passenger classification module 6;
the seat heating state signal is acquired through the seat heating sensor 2 and sent to the passenger classification module 6; the seat heating state signal is divided into two states, namely an open state ON and a closed state OFF. The opening state ON and the closing state OFF are both effective signals, and the others are ineffective signals.
Acquiring an outside temperature signal through a temperature sensor 3, and sending the outside temperature signal to a passenger classification module 6;
acquiring a vehicle deceleration signal by the collision sensor 4 and sending the deceleration signal to the first airbag controller 7;
acquiring whether the safety belt is effectively inserted or not, and sending the acquired whether the safety belt is effectively inserted or not to the safety airbag controller 7; the signal for acquiring whether the safety belt is effectively inserted comprises an inserted signal and an uninserted signal. The inserted signal and the non-inserted signal are valid signals, and the others are invalid signals.
The passenger classification module 6 receives the passenger weight signal, the seat heating state signal and the vehicle outside temperature signal, calculates the effective length Lr of the safety belt, performs passenger classification and identification according to the effective length Lr of the safety belt, and transmits the information of passenger classification to the safety air bag controller 7;
the specific method for calculating the effective length Lr of the seat belt by the occupant classification module 6 is as follows:
calculating the effective length Lr of the safety belt as L according to the weight signal, wherein L is the length of the safety belt;
the effective length Lr of the safety belt calculated according to the seat heating state signal is L a, and a is a correction coefficient of the seat heating state signal;
the effective length Lr of the safety belt calculated according to the temperature signal outside the automobile is L b, and b is a correction coefficient of the temperature signal outside the automobile;
when the seat heating state signal and the safety belt effective insertion signal are both invalid signals, the effective length Lr of the safety belt is equal to L;
when only the seat heating state signal is an effective signal, the effective length Lr of the safety belt is L a;
when only the temperature signal outside the automobile is an effective signal, the effective length Lr of the safety belt is L b;
when both the seat heating state signal and the vehicle exterior temperature signal are active, the effective seatbelt length Lr is L × b.
When the seat heating state signal is ON, indicating that the environment is cold and the thickness of the clothes of the passenger is increased, setting the parameter a to a1(a1 can be set to 1.1-1.2); when the seat heating state signal is OFF, it indicates that the environment is comfortable and the thickness of the occupant's clothes is normal, and the setting parameter a is a2(a2 may be set to 1.0).
When the collected external temperature T < -15 > of the vehicle represents the environment is cold, the dressing thickness of the passengers is the thickest, and b is set to b1(b1 can be set to 1.1-1.2); when the collected temperature outside the automobile is-15 and T <5, the environment is cold, the wearing thickness of the passengers is thick, and b is b2(b2 can be set to be 1.05-1.1); when the acquired temperature outside the vehicle is more than or equal to 5 and T <15, the environment is cool, the dressing thickness of the passenger is thin, and b is set to b3(b3 can be set to 1.01-1.05); when the collected temperature outside the vehicle is equal to or less than 15T, the environment is moderate, the dressing thickness of the passenger is the thinnest, and b is set to b4(b4 can be set to 1.0).
A specific method of classifying the occupant according to the effective belt length Lr is as follows:
when Lr < L1(L1 may be set to 1500mm), the occupant type is a child occupant;
when L1 ≦ Lr < L2(L2 may be set to 1700mm), the occupant type is a small-sized occupant;
when L2 ≦ Lr < L3(L3 may be set to 2600mm), the occupant type is a medium size occupant;
when Lr is larger than or equal to L3, the passenger type is a large-size passenger;
wherein the child passenger is a passenger with a sitting height of less than 750 mm; the small-size passenger is a passenger with the seat height range of 750-790 mm; the middle-size passenger is a passenger with the seat height range of 791-890 mm; the large-size passenger is a passenger with the sitting height of more than 890 mm.
The safety airbag controller 7 receives the vehicle deceleration signal, the safety belt effective insertion signal and the occupant classification information to calculate the safety airbag explosion algorithm, generates an explosion instruction and sends the explosion instruction to the gas generator controller 9;
the specific method for generating the airbag explosion command by the airbag controller 7 receiving the vehicle deceleration signal, the seatbelt valid insertion signal, and the occupant classification information is as follows:
when the vehicle deceleration signal a > a1, and the seatbelt effective insertion signal S is inserted, and the occupant classification P is a small-sized occupant, the airbag controller 7 issues a first ignition command to the gas generator controller 9;
when the vehicle deceleration signal a > a1, and the seatbelt effective inserted signal S is inserted, and the occupant classification P is a medium size occupant, the airbag controller 7 issues a second ignition command to the gas generator controller 9;
when the vehicle deceleration signal a > a1, and the belt-effective-insertion-signal S is inserted, and the occupant classification P is a large-sized occupant, the airbag controller 7 issues a third ignition command to the gas generator controller 9;
when the vehicle deceleration signal a is equal to or less than a1, or when the seatbelt effective insertion signal S is not inserted, or when the occupant classification P is a child occupant, the airbag controller 7 does not issue an ignition command.
The gas generator controller 9 receives the signal from the safety air bag controller 7, judges the grade of the section detonation signal and detonates the gas generator according to the grade of the detonation signal;
the gas generator performs detonation control to release gas to inflate the airbag assembly 8.
The gas generator controller 9 receives a signal from the airbag controller 7 to perform the explosion control, and the specific method is as follows:
when the detonation signal is level 1, the detonation gas generator is level 1 and 10;
when the detonation signal is level 2, detonating the level 1 10 of the gas generator and the level 2 of the gas generator 11;
when the detonation signal is 3 grades, the detonation gas generator is 1 grade 10, the gas generator is 2 grade 11 and the gas generator is 3 grade 12;
and the gas generator 1 level 10, the gas generator 2 level 11 and the gas generator 3 level 12 are subjected to explosion control, release gas and inflate the safety airbag assembly 8.
Example two
Referring to fig. 1, an embodiment of the present invention provides a seat belt-based adaptive airbag control system, which is configured to implement a seat belt-based adaptive airbag control method, and includes:
the safety belt length sensor 1 is arranged in a seat cushion and used for acquiring a weight signal of a passenger;
the seat heating sensor 2 is arranged in the seat and used for acquiring a seat heating state signal;
the temperature sensor 3 is arranged outside the vehicle and used for acquiring a temperature signal outside the vehicle;
a collision sensor 4 disposed on the vehicle body for acquiring a vehicle deceleration signal;
the safety belt lock sensor 5 is integrated in the safety belt lock and used for acquiring whether the safety belt is effectively inserted;
the passenger classification module 6 is used for receiving signals collected by the safety belt length sensor 1, the seat heating sensor 2 and the temperature sensor 3, calculating the effective length Lr of the safety belt, classifying and identifying passengers according to the effective length Lr of the safety belt, and transmitting the classification information of the passengers to the safety airbag controller 7;
the safety air bag controller 7 is used for receiving the classification information of passengers, and signals collected by the collision sensor 4 and the safety belt lock catch sensor 5 to generate an explosion instruction to the gas generation controller 9;
a gas generator controller 9 for receiving a signal from the airbag controller 7 and controlling the gas generator;
the gas generator is used for receiving signals of the gas generation controller 9, carrying out explosion control, releasing gas and inflating the safety airbag assembly 8; the gas generator includes a gas generator 1 stage 10, a gas generator 2 stage 11, and a gas generator 3 stage 12.
And an airbag assembly 8 for protecting an occupant.
In conclusion, the invention can identify the physical sign and position of the passenger according to the effective length of the safety belt, can subdivide the passenger into a child passenger, a small-sized passenger, a medium-sized passenger and a large-sized passenger through threshold setting, and automatically adjusts the key points of the volume, the pressure and the like of the safety air bag aiming at different passenger types
According to the invention, the effective length characteristic of the safety belt is adopted to carry out algorithm judgment, and meanwhile, the temperature signal and the seat heating state signal are utilized to correct the length threshold of the safety belt, so that the problem that the dressing thickness of a passenger influences the recognition accuracy of the passenger is solved, the recognition is more accurate, the logic is simple, and the cost is low.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for adaptive seatbelt-based airbag control, comprising:
collecting a passenger weight signal and sending the weight signal to a passenger classification module (6);
acquiring a seat heating state signal, and sending the seat heating state signal to a passenger classification module (6);
acquiring an outside temperature signal, and sending the outside temperature signal to a passenger classification module (6);
-acquiring a vehicle deceleration signal and sending the deceleration signal to a first airbag controller (7);
acquiring whether the safety belt is effectively inserted into the signal and sending the acquired whether the safety belt is effectively inserted into the signal to the safety air bag controller (7);
the passenger classification module (6) receives a passenger weight signal, a seat heating state signal and an outside temperature signal, calculates the effective length Lr of the safety belt, classifies and identifies passengers according to the effective length Lr of the safety belt, and transmits the information of passenger classification to the safety air bag controller (7);
the safety airbag controller (7) receives the vehicle deceleration signal, the safety belt effective insertion signal and the passenger classification information to calculate the safety airbag explosion algorithm, generates an explosion instruction and sends the explosion instruction to the gas generator controller (9);
the gas generator controller (9) receives a signal from the safety air bag controller (7), judges the grade of a section detonation signal and detonates a gas generator in response according to the grade of the detonation signal;
the gas generator is used for carrying out detonation control, releasing gas and inflating the safety air bag assembly (8).
2. The seatbelt-based adaptive airbag control method according to claim 1, wherein the seat heating state signal is divided into two states, an ON state and an OFF state.
3. The seatbelt-based adaptive airbag control method of claim 1, wherein the acquiring of valid seatbelt inserted signal comprises inserted signal and not inserted signal.
4. A seat-belt-based adaptive airbag control method according to claim 1, characterized in that the occupant classification module (6) calculates the effective seat-belt length Lr as follows:
calculating the effective length Lr of the safety belt as L according to the weight signal, wherein L is the length of the safety belt;
the effective length Lr of the safety belt calculated according to the seat heating state signal is L a, and a is a correction coefficient of the seat heating state signal;
the effective length Lr of the safety belt calculated according to the temperature signal outside the automobile is L b, and b is a correction coefficient of the temperature signal outside the automobile;
when the seat heating state signal and the safety belt effective insertion signal are both invalid signals, the effective length Lr of the safety belt is equal to L;
when only the seat heating state signal is an effective signal, the effective length Lr of the safety belt is L a;
when only the temperature signal outside the automobile is an effective signal, the effective length Lr of the safety belt is L & ltb & gt;
when the seat heating state signal and the vehicle outside temperature signal are both valid, the effective length Lr of the seat belt is L × b.
5. The seatbelt-based adaptive airbag control method according to claim 4, wherein when the seat heating state signal is ON, indicating that the environment is cold and the thickness of the occupant's clothing is increased, the setting parameter a is a 1; when the seat heating state signal is OFF, it indicates that the environment is comfortable and the thickness of the occupant's clothes is normal, and the setting parameter a is a 2.
6. The seatbelt-based adaptive airbag control method according to claim 4, wherein when the acquired outside temperature T < -15 represents the ambient cold, the occupant has the thickest dressing thickness, and b is set as b 1; when the acquired temperature outside the vehicle is-15 and T <5, the environment is cold, the dressing thickness of the passenger is thicker, and b is set as b 2; when the acquired temperature outside the vehicle is more than or equal to 5 and T is less than 15, the environment is cool, the dressing thickness of the passenger is thin, and b is set as b 3; when the collected temperature outside the vehicle is equal to or less than 15T, the environment is moderate, the dressing thickness of the passenger is the thinnest, and b is set to be b 4.
7. The seatbelt-based adaptive airbag control method according to claim 1, wherein the occupant classification according to the effective seatbelt length Lr is performed as follows:
when Lr < L1, the occupant type is a child occupant;
when L1 is less than or equal to Lr < L2, the passenger type is a small-sized passenger;
when L2 is less than or equal to Lr < L3, the passenger type is a middle-size passenger;
when Lr is larger than or equal to L3, the passenger type is a large-body passenger;
wherein the child passenger is a passenger with a sitting height of less than 750 mm; the small-size passenger is a passenger with the seat height range of 750-790 mm; the middle-size passenger is a passenger with the seat height range of 791-890 mm; the large-size passenger is a passenger with the sitting height of more than 890 mm.
8. A seat-belt-based adaptive airbag control method according to claim 7, wherein the specific method for generating the airbag ignition command by the airbag controller (7) receiving the vehicle deceleration signal, the seat-belt valid insertion signal and the occupant classification information is as follows:
when the vehicle deceleration signal A > A1, and the seatbelt effective insertion signal S is inserted, and the occupant classification P is a small-sized occupant, the airbag controller (7) issues a first ignition command to the gas generator controller (9);
when the vehicle deceleration signal A > A1, the safety belt effective insertion signal S is inserted, and the passenger classification P is a middle size passenger, the safety air bag controller (7) sends a second ignition instruction to the gas generator controller (9);
when the vehicle deceleration signal A > A1, and the seatbelt effective insertion signal S is inserted, and the occupant classification P is large occupant, the airbag controller (7) issues a third ignition command to the gas generator controller (9);
when the vehicle deceleration signal A is less than or equal to A1, or when the safety belt is effectively inserted signal S is not inserted, or when the passenger classification P is a child passenger, the air bag controller (7) does not give an ignition instruction.
9. A seatbelt-based adaptive airbag control method according to claim 8, wherein the gas generator controller (9) receives a signal from the airbag controller (7) to perform an ignition control, and the method comprises:
when the detonation signal is level 1, detonating the gas generator level 1 (10);
when the explosion signal is 2 level, the gas generator is detonated by 1 level (10) and 2 levels (11);
when the detonation signal is 3 levels, detonating the gas generator 1 level (10), the gas generator 2 level (11) and the gas generator 3 level (12);
and the gas generator 1 level (10), the gas generator 2 level (11) and the gas generator 3 level (12) are subjected to detonation control, release gas and inflate the safety airbag assembly (8).
10. A seatbelt-based adaptive airbag control system for implementing a seatbelt-based adaptive airbag control method, comprising:
the safety belt length sensor (1) is arranged in a seat cushion and used for acquiring a weight signal of an occupant;
the seat heating sensor (2) is arranged in the seat and is used for acquiring a seat heating state signal;
the temperature sensor (3) is arranged outside the vehicle and is used for acquiring a temperature signal outside the vehicle;
a collision sensor (4) arranged on the vehicle body for acquiring a vehicle deceleration signal;
the safety belt lock sensor (5) is integrated in the safety belt lock and used for acquiring whether the safety belt is effectively inserted;
the passenger classification module (6) is used for receiving signals collected by the safety belt length sensor (1), the seat heating sensor (2) and the temperature sensor (3) to calculate the effective length Lr of the safety belt, classifying and identifying passengers according to the effective length Lr of the safety belt, and transmitting the classification information of the passengers to the safety air bag controller (7);
the safety air bag controller (7) is used for receiving occupant classification information, signals collected by the collision sensor (4) and the safety belt lock catch sensor (5) and generating an explosion instruction to the gas generation controller (9);
a gas generation controller (9) for receiving a signal from the airbag controller (7) and controlling the gas generator;
the gas generator is used for receiving a signal of the gas generation controller (9), carrying out explosion control, releasing gas and inflating the safety airbag assembly (8); the gas generator comprises a gas generator stage 1 (10), a gas generator stage 2 (11) and a gas generator stage 3 (12).
An airbag assembly (8) for protecting an occupant.
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